Conjunction Event Detail

    ✅
    Low Risk
    Low collision probability. Continue monitoring.
    1.178598E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-10-20T20:33:54+0800
    View CDM
    Download CDM 1.0

    1 Object 1

    AOE ID 51111
    NORAD ID 51111
    Object Type PAYLOAD
    Country
    US US
    ← VS →

    2 Object 2

    AOE ID 53149
    NORAD ID 53149
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter STARLINK-3173 STARLINK-4021
    Time of Closest Approach 2026-10-21T11:26:05+0000
    Collision Probability (Pc) 1.178598E-6
    Conjunction Distance (km) 2.901 km
    Relative Speed (km/s) 11.008 km/s
    Conjunction Risk Parameters R (Radial): 2.863 | I (In-track): -0.311 | C (Cross-track): 0.346
    Collision Risk Index (CRI) 0.36
    X Position (km) 5885.793 5888.291
    Position Y (km) 502.333 502.079
    Position Z (km) 3435.683 3437.136
    Velocity X (km/s) -3.215 2.313
    Velocity Y (km/s) 5.044 5.515
    Velocity Z (km/s) 4.754 -4.753

    Orbital Parameters 国际轨道数据源

    Parameter STARLINK-3173 STARLINK-4021
    Semimajor Axis (a) 6837.861 km 6840.880 km
    Eccentricity (e) 0.000130 0.000127
    Inclination (i) 53.1601° 53.1580°
    RAAN 347.5953° 216.9384°
    Perigee Argument 88.8549° 99.6398°
    Mean Anomaly (M) 271.2603° 260.4748°
    Apogee 460.610 km 463.612 km
    Perigee 458.838 km 461.874 km
    Orbit Epoch 2026-10-19T15:31:26+0000 2026-10-20T03:33:29+0000

    STARLINK-3173 & STARLINK-4021 Collision Probability (Pc) Trend

    STARLINK-3173 & STARLINK-4021 Collision Probability (Pc) TrendNot Available

    STARLINK-3173 & STARLINK-4021 Miss Distance (Miss Distance) Trend

    STARLINK-3173 & STARLINK-4021 Miss Distance (Miss Distance) TrendNot Available

    STARLINK-3173Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    STARLINK-4021Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    STARLINK-3173Collision Probability Trend

    Object 1 Probability TrendNot Available

    STARLINK-4021Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with STARLINK-3173

    No nearby objects data